Process of obtaining sugar from molasses.



AUGUST GRANTZDbRFFER, 0F MAGDEBURG, GERMANY, ASSIG-NOR OF ONE-HALF T0 ADOLPH LIST, OF MAGDEBURG, GERMANY.

PROCESS OF OBTAINING SUGAR FROM MOLASSES.

1 $395,852. Specification of Letters Patent.

No Drawing. Application filed July 19, 1913.

Patented May 5, 1914:.

Serial No. 779,964.

To all whom it may concern Be it known that I, AUGUST Gnlin'rznonrrun, engineer, citizen of the Kingdom of Prussia, Empire of Germany, residing at Magdeburg, Germany, have invented certain new and useful Improvements in the Procof Obtaining Sugar from Molasses, of which the following is a specification.

My invention relates to improvements in the process of obtaining sugar from m0- lasses.

In the process of making sugar the juice concentrated and allowed to stand to perinit crystallization, after which the crystals are separated from the syrupy residue. The syrupy residue is again concentrated and the sugar contained therein separated and this process is repeated until finally molasses is obtained which still contains sugar, but does not crystallize any more.

The object of the improvements is to provide a process whereby a large amount of the sugar which is still contained in the mo-- lasses coming from the last crystallization can be obtained, and in which the residues coming from the first crystallizations are boiled down in such a way, that a White sugar is obtained which is suitable for treatment in centrifugal machines. Vith this object in view to the residues coming from the first crystallizations after the crystals have formed a mixture is added which con sists of molasses coming from the last crystallization and a solution of sugar. Thereby an amount of sugar is obtained from the molasses which is in excess of What has been added thereto in the form of sugar-solution, and the sugar which is crystallized from the residues of the first crystallizations is improved. For example, if the quotient of the residues of the first crystallizations is TO TS, and that of the molasses of the last crystallization 5860, and a sugar solution of 60 Brix with a yield (rendement) of 75% of the sugar is added, molasses of lower degree of purity (say 56 to 58) is obtained by the treatment in a centrifugal machine, Besides the amount is less than in the ordinary process, and it can be further reduced when using the same molasses over again (say to i; or The output in sugarwhich is thus obtained is increased accordingly.

I claim herein as my invention:

The herein described process of obtaining sugar from the residues of the first crystallizations of the concentrated juice, which consists in boiling the said residues, and adding thereto after the crystals have formed a mixture of a sugar solution and n'iolasses from the last crystallization.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

AUGII ST GRANTZDORFFER.

IVitnesses ERNEST L. Ivns, LUoIn OEHLMANN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, I). G. 

